Question: When was the population of Nevada recorded as 488738.0?
Paraphrase: The population of Nevada was listed as 488,738.0 on what date?
SPARQL (Wikidata): SELECT ?value WHERE { wd:Q1227 p:P1082 ?s . ?s ps:P1082 ?x filter(contains(?x , '488738.0')) . ?s pq:P585 ?value}